Not an Issue, but looking for Suggest to setup Nginx-rtmp

Hello All, I'm beginner for nginx-rtmp and I wonder what is the best configuration that fits for my system.

Now I want to setup nginx-rtmp for broadcast live video from webcam. Server could receive 500+ publisher and allow anyone to play/stream to publisher they want. Client can access from web and mobile (android and iOS). Here is my cloud server spec: 4 CPU 9 GB of RAM 150 GB Storage

is it enough? Anyone has suggest for the best configuration server? I try to setup, but it's really lag and always freeze. and when I use exec ffmpeg, it is not working. For publishing live webcam to server, I use OBS.

Thanks for your suggest.

Here is my conf:

worker_processes  1;
error_log  logs/error.log debug;

events {
    worker_connections  1024;
}
rtmp {
    server {
            listen 1935;
            allow play all;

            application live {
                    allow play all;
                    live on;
                    hls on;
                    hls_path /HLS/live;
                    hls_fragment 10s;

                    exec /usr/bin/ffmpeg -i rtmp://localhost:1935/live/$name -c:v libx264 -c:a libfaac -ar 44100 -ac 1 -f flv rtmp://localhost:1935/mobile/$name;
            }

            application mobile {
                    allow play all;
                    live on;
                    hls on;
                    hls_path /HLS/mobile;
                    hls_fragment 10s;
            }
    }
}
http {
    include       mime.types;
    default_type  application/octet-stream;

    server {
            listen 8000;
            server_name localhost;

            location /live {
                    types {
                            application/vnd.apple.mpegurl m3u8;
                            video/mp2t ts;
                    }
                    alias /HLS/live;
                    add_header Cache-Control no-cache;
                    add_header Access-Control-Allow-Origin *;
            }

            location /mobile {
                    types {
                            application/vnd.apple.mpegurl m3u8;
                            video/mp2t ts;
                    }
                    alias /HLS/mobile;
                    add_header Cache-Control no-cache;
                    add_header Access-Control-Allow-Origin *;
            }
            #allows us to see how stats on viewers on our Nginx site using a URL like: "http://my-ip/stats"
            location /stats {
                    rtmp_stat all;
            }

            #allows us to host some webpages which can show our videos: "http://my-ip/my-page.html"
            location / {
                    root   html;
                    index  index.html index.htm;
            }
    }
}

arut / nginx-rtmp-module

Not an Issue, but looking for Suggest to setup Nginx-rtmp #675